Finding the Third Proportional to 87,428.53 and 139,024.69

Step by Step Solution

1. Step 1: Write the proportion equation
   87,428.53 : 139,024.69 = 139,024.69 : x
2. Step 2: Convert to fraction form
   87,428.53/139,024.69 = 139,024.69/x
3. Step 3: Cross multiply
   87,428.53x = 139,024.69 × 139,024.69
4. Step 4: Simplify right side
   87,428.53x = 19,327,863,734.47
5. Step 5: Solve for x
   x = 19,327,863,734.47/87,428.53
6. Step 6: Final answer
   x = 221,070.44